Teknologi Dan Rekayasa DEFORMATION.

TRANSVERSAL SHRINKAGE Teknologi dan Rekayasa

LONGITUDINAL SHRINKAGE Teknologi dan Rekayasa

BUTT JOINT AND FILLET JOIN Teknologi dan Rekayasa

LONGITUDINAL DEFORMATION AND WAVE DEFORMATION Teknologi dan Rekayasa

THERMAL ALIGMENT WITH LOCAL HEATING Teknologi dan Rekayasa

THERMAL ALIGMENT WITH LINE HEATING COLD WATER Teknologi dan Rekayasa

THERMAL ALIGMENT AT LONGITUDINAL DEFORMATION HEAT ZONE Teknologi dan Rekayasa

Teknologi dan Rekayasa

Teknologi dan Rekayasa

Teknologi dan Rekayasa

Teknologi dan Rekayasa

Teknologi dan Rekayasa

Teknologi dan Rekayasa

Teknologi dan Rekayasa

PLATE JOINT Teknologi dan Rekayasa

LINE HEATING The line heating is the most popular method and a 90 % or more of the fairing work is carried out by this method. A knuckled deformation occurs on the steel plate by line heating. The process of this phenomenon is as follows : Teknologi dan Rekayasa

KIND AND FEATURE OF HEATING METHODS Basical distortion removing method and to be used for heating from outside. 1 To make shrinking force to each direction, the evenly finished surface can obtained by the balanced fairing. 2 To be used for removing large distortion, Relatively balanced finish is obtained. 3 To be applied for a thin plate because of a large shrinking force 4 To be use for fairing or shaping for curved frame 5 Red heating method combined with external force to be applied for partially and radically concave and convex part 6 Teknologi dan Rekayasa

TRIANGLE HEATING Teknologi dan Rekayasa This method can be applied if you understnd the line heating method, and is applied for the fairing and bending of angle bar and flat. The process of this heating method is shown bellow. Teknologi dan Rekayasa

TRIANGLE HEATING (CONTINUE) Namely in bending of steel bar, the plate is heated on a whole thickness in triagular shape, hollow side as the base of triangle and side is the vertex as on the above. When the length of vertical line of triangle exceeds about 2/3 of plate breadth, it has less effect in bending, also there is a possibility to be bent an opposite direction by internal stresses, you should pay attention. 2/3 Teknologi dan Rekayasa

WEB PLATE DISTORTION AND HEATING POSITIONS Teknologi dan Rekayasa

FACE PLATE DISTORTION AND HEATING POSITION Correction procedure 1. To carry out line heating on the convex side of the web from the bottom. 2. To heat upward continuously and then carry out triangle heating on the face plate. Remarks 1. The line heating on a web plate should be started from the less curved part. 2. The triangle heating should be done in half a width of the face plate so that the heat can penetrate through the plate thickness. 3. The use of external force effect should be taken for a large curvature Teknologi dan Rekayasa

METHOD USING STAYS Teknologi dan Rekayasa

PLATE EDGE WAVE PROFILE Teknologi dan Rekayasa

DISTORTION LIKE WAVE Teknologi dan Rekayasa

DISTORTION LIKE WAVE ( CONTINUES ) CORRECTION OF DISTORTION LIKE WAVE (PRINCIPLE) 1. To carry out the line heating from outside : a. Not to overheat. b. Not to heat the side convexed from the frame position. 2. To carry out the heating between the frame position. a. To start heating from convex part. b. To be persistent to correct broadly an object with a certain area ( not to correct an object at a spot ). Teknologi dan Rekayasa

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